The ban in New York City has been in place since 2013, when it was included in the city's Smoke Free Air Act.
Mr. Singh acknowledged that the product he sells may be a health risk, but believes it is a lesser evil; most customers use it as way to quit traditional cigarettes, he said.
Andrew Cuomo signed a new law Monday adding electronic cigarettes to the Clean Indoor Air Act - making them illegal anywhere tobacco cigarettes are already barred. "This measure closes another unsafe loophole in the law, creating a stronger, healthier NY for all".
The New York State Court of Appeals rejected the most recent challenge to New York City's ban earlier this year, finding the inclusion of e-cigs in the law was valid.
Another pending bill seeks to require e-cigarette sellers to register with the state as tobacco retailers do - a tactic to mitigate sales to youths.
But proponents of devices like e-cigs and vaporizers - larger, cellphone-size gadgets - say they are a safer alternative to cigarettes and may help with smoking cessation.
Electronic cigarette use will be prohibited in all places where tobacco smoking is now banned when new legislation goes into effect on November 22 in New York State.
The health consequences of c-cigarette use are unclear.
New York State Sen.
Electronic and vapor-delivery systems often times contain nicotine. "I am pleased that the governor signed this bill into law, and look forward to continuing to work with the administration to enhance New York's tobacco control measures".
The American Cancer Society thanked Cuomo for taking a step to protect the health of all New Yorkers.